Eudora is a robust e-mail client whose features include multiple address-book-formatting options and the ability to filter, redirect, and forward mail. It supports QuickTime- and HTML-enriched e-mail, letting you include stylized, formatted text and in-line graphics in your messages. Other features include a multipaned interface; background mail-checking and sending; the ability to import existing settings, e-mail, and address books from Microsoft Outlook, Outlook Express, or Netscape mail programs; a Qualcomm PureVoice plug-in that allows voice-message exchanges; and a customizable interface, including movable, dockable window groups and toolbars. Eudora also features support for regular expressions in filters, field autocompletion, an automatic spelling checker, and a filter that will speak the name and subject of incoming messages (requires sound card). Version 6.1.2 now gives a warning when any file link that is not in the attachment directory is launched or when launching attachments or other file links when file has no extension, and fixes some issues.

Note: This program can operate in any of three user-selectable modes. Sponsored mode allows you to use the full-featured Eudora e-mail client at no charge, but displays a series of static onscreen advertisements. Paid mode allows you to use the full-featured Eudora e-mail client without advertisements once a payment has been made. Light mode is an upgrade to the current Eudora Light, but it does not have as many features as the full client available in Sponsored and Paid modes. Light mode will include a sponsor image or logo but no rotating advertising. You can switch between Light mode and Sponsored mode at any time.